Re: Mac OS X Prompt Bug

["Benjamin R. Haskell" <zsh@benizi.com>]

On Wed, 24 Nov 2010, Sorin Ionescu wrote:

> Yes, iTerm2 does not have this problem. While unsetopt PROMPT_SP 
> removes the %, the blank lines are still echoed. The easiest way to 
> test this is to touch ~/.hushlogin and open Terminal.app. Notice the 
> scrollbar.
>
> So, PROMPT_SP is definitely not the problem. It seems the prompt is 
> being pushed down by the blank lines. Hence why % is not being 
> overwritten by the prompt in the screenshot.

So, figure out what's printing out the blank lines.

You mentioned /etc/zshenv.  What about /etc/zshprofile or /etc/zshrc? 
Or maybe even /etc/profile, which is often sourced by system Zsh startup 
files, depending on how Zsh is distributed.

Maybe see if something is set up with hook functions:

$ functions preexec precmd chpwd periodic TRAPDEBUG

As a last resort, try to run Zsh with tracing enabled:

zsh -x  (then Ctrl-d or quit)
[produces lots of output, but maybe near the end you'll see something 
printing out some blank lines]

Might need: zsh -l -x
(not sure how you start your commands in OS X terminal)

-- 
Best,
Ben